Loading...
1/*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2005 David Brownell
6 * (C) Copyright 2002 Hewlett-Packard Company
7 *
8 * OMAP Bus Glue
9 *
10 * Modified for OMAP by Tony Lindgren <tony@atomide.com>
11 * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
12 * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
13 *
14 * This file is licenced under the GPL.
15 */
16
17#include <linux/clk.h>
18#include <linux/dma-mapping.h>
19#include <linux/err.h>
20#include <linux/gpio.h>
21#include <linux/io.h>
22#include <linux/jiffies.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/usb/otg.h>
26#include <linux/platform_device.h>
27#include <linux/signal.h>
28#include <linux/usb.h>
29#include <linux/usb/hcd.h>
30
31#include "ohci.h"
32
33#include <asm/io.h>
34#include <asm/mach-types.h>
35
36#include <mach/mux.h>
37
38#include <mach/hardware.h>
39#include <mach/irqs.h>
40#include <mach/usb.h>
41
42
43/* OMAP-1510 OHCI has its own MMU for DMA */
44#define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
45#define OMAP1510_LB_CLOCK_DIV 0xfffec10c
46#define OMAP1510_LB_MMU_CTL 0xfffec208
47#define OMAP1510_LB_MMU_LCK 0xfffec224
48#define OMAP1510_LB_MMU_LD_TLB 0xfffec228
49#define OMAP1510_LB_MMU_CAM_H 0xfffec22c
50#define OMAP1510_LB_MMU_CAM_L 0xfffec230
51#define OMAP1510_LB_MMU_RAM_H 0xfffec234
52#define OMAP1510_LB_MMU_RAM_L 0xfffec238
53
54#define DRIVER_DESC "OHCI OMAP driver"
55
56#ifdef CONFIG_TPS65010
57#include <linux/i2c/tps65010.h>
58#else
59
60#define LOW 0
61#define HIGH 1
62
63#define GPIO1 1
64
65static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
66{
67 return 0;
68}
69
70#endif
71
72extern int usb_disabled(void);
73extern int ocpi_enable(void);
74
75static struct clk *usb_host_ck;
76static struct clk *usb_dc_ck;
77
78static const char hcd_name[] = "ohci-omap";
79static struct hc_driver __read_mostly ohci_omap_hc_driver;
80
81static void omap_ohci_clock_power(int on)
82{
83 if (on) {
84 clk_enable(usb_dc_ck);
85 clk_enable(usb_host_ck);
86 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
87 udelay(100);
88 } else {
89 clk_disable(usb_host_ck);
90 clk_disable(usb_dc_ck);
91 }
92}
93
94/*
95 * Board specific gang-switched transceiver power on/off.
96 * NOTE: OSK supplies power from DC, not battery.
97 */
98static int omap_ohci_transceiver_power(int on)
99{
100 if (on) {
101 if (machine_is_omap_innovator() && cpu_is_omap1510())
102 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
103 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
104 INNOVATOR_FPGA_CAM_USB_CONTROL);
105 else if (machine_is_omap_osk())
106 tps65010_set_gpio_out_value(GPIO1, LOW);
107 } else {
108 if (machine_is_omap_innovator() && cpu_is_omap1510())
109 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
110 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
111 INNOVATOR_FPGA_CAM_USB_CONTROL);
112 else if (machine_is_omap_osk())
113 tps65010_set_gpio_out_value(GPIO1, HIGH);
114 }
115
116 return 0;
117}
118
119#ifdef CONFIG_ARCH_OMAP15XX
120/*
121 * OMAP-1510 specific Local Bus clock on/off
122 */
123static int omap_1510_local_bus_power(int on)
124{
125 if (on) {
126 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
127 udelay(200);
128 } else {
129 omap_writel(0, OMAP1510_LB_MMU_CTL);
130 }
131
132 return 0;
133}
134
135/*
136 * OMAP-1510 specific Local Bus initialization
137 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
138 * See also arch/mach-omap/memory.h for __virt_to_dma() and
139 * __dma_to_virt() which need to match with the physical
140 * Local Bus address below.
141 */
142static int omap_1510_local_bus_init(void)
143{
144 unsigned int tlb;
145 unsigned long lbaddr, physaddr;
146
147 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
148 OMAP1510_LB_CLOCK_DIV);
149
150 /* Configure the Local Bus MMU table */
151 for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
152 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
153 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
154 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
155 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
156 OMAP1510_LB_MMU_CAM_L);
157 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
158 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
159 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
160 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
161 }
162
163 /* Enable the walking table */
164 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
165 udelay(200);
166
167 return 0;
168}
169#else
170#define omap_1510_local_bus_power(x) {}
171#define omap_1510_local_bus_init() {}
172#endif
173
174#ifdef CONFIG_USB_OTG
175
176static void start_hnp(struct ohci_hcd *ohci)
177{
178 struct usb_hcd *hcd = ohci_to_hcd(ohci);
179 const unsigned port = hcd->self.otg_port - 1;
180 unsigned long flags;
181 u32 l;
182
183 otg_start_hnp(hcd->usb_phy->otg);
184
185 local_irq_save(flags);
186 hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
187 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
188 l = omap_readl(OTG_CTRL);
189 l &= ~OTG_A_BUSREQ;
190 omap_writel(l, OTG_CTRL);
191 local_irq_restore(flags);
192}
193
194#endif
195
196/*-------------------------------------------------------------------------*/
197
198static int ohci_omap_reset(struct usb_hcd *hcd)
199{
200 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
201 struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
202 int need_transceiver = (config->otg != 0);
203 int ret;
204
205 dev_dbg(hcd->self.controller, "starting USB Controller\n");
206
207 if (config->otg) {
208 hcd->self.otg_port = config->otg;
209 /* default/minimum OTG power budget: 8 mA */
210 hcd->power_budget = 8;
211 }
212
213 /* boards can use OTG transceivers in non-OTG modes */
214 need_transceiver = need_transceiver
215 || machine_is_omap_h2() || machine_is_omap_h3();
216
217 /* XXX OMAP16xx only */
218 if (config->ocpi_enable)
219 config->ocpi_enable();
220
221#ifdef CONFIG_USB_OTG
222 if (need_transceiver) {
223 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
224 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
225 int status = otg_set_host(hcd->usb_phy->otg,
226 &ohci_to_hcd(ohci)->self);
227 dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
228 hcd->usb_phy->label, status);
229 if (status) {
230 usb_put_phy(hcd->usb_phy);
231 return status;
232 }
233 } else {
234 dev_err(hcd->self.controller, "can't find phy\n");
235 return -ENODEV;
236 }
237 ohci->start_hnp = start_hnp;
238 }
239#endif
240
241 omap_ohci_clock_power(1);
242
243 if (cpu_is_omap15xx()) {
244 omap_1510_local_bus_power(1);
245 omap_1510_local_bus_init();
246 }
247
248 ret = ohci_setup(hcd);
249 if (ret < 0)
250 return ret;
251
252 if (config->otg || config->rwc) {
253 ohci->hc_control = OHCI_CTRL_RWC;
254 writel(OHCI_CTRL_RWC, &ohci->regs->control);
255 }
256
257 /* board-specific power switching and overcurrent support */
258 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
259 u32 rh = roothub_a (ohci);
260
261 /* power switching (ganged by default) */
262 rh &= ~RH_A_NPS;
263
264 /* TPS2045 switch for internal transceiver (port 1) */
265 if (machine_is_omap_osk()) {
266 ohci_to_hcd(ohci)->power_budget = 250;
267
268 rh &= ~RH_A_NOCP;
269
270 /* gpio9 for overcurrent detction */
271 omap_cfg_reg(W8_1610_GPIO9);
272 gpio_request(9, "OHCI overcurrent");
273 gpio_direction_input(9);
274
275 /* for paranoia's sake: disable USB.PUEN */
276 omap_cfg_reg(W4_USB_HIGHZ);
277 }
278 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
279 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
280 } else if (machine_is_nokia770()) {
281 /* We require a self-powered hub, which should have
282 * plenty of power. */
283 ohci_to_hcd(ohci)->power_budget = 0;
284 }
285
286 /* FIXME hub_wq hub requests should manage power switching */
287 omap_ohci_transceiver_power(1);
288
289 /* board init will have already handled HMC and mux setup.
290 * any external transceiver should already be initialized
291 * too, so all configured ports use the right signaling now.
292 */
293
294 return 0;
295}
296
297/*-------------------------------------------------------------------------*/
298
299/**
300 * usb_hcd_omap_probe - initialize OMAP-based HCDs
301 * Context: !in_interrupt()
302 *
303 * Allocates basic resources for this USB host controller, and
304 * then invokes the start() method for the HCD associated with it
305 * through the hotplug entry's driver_data.
306 */
307static int usb_hcd_omap_probe (const struct hc_driver *driver,
308 struct platform_device *pdev)
309{
310 int retval, irq;
311 struct usb_hcd *hcd = 0;
312
313 if (pdev->num_resources != 2) {
314 dev_err(&pdev->dev, "invalid num_resources: %i\n",
315 pdev->num_resources);
316 return -ENODEV;
317 }
318
319 if (pdev->resource[0].flags != IORESOURCE_MEM
320 || pdev->resource[1].flags != IORESOURCE_IRQ) {
321 dev_err(&pdev->dev, "invalid resource type\n");
322 return -ENODEV;
323 }
324
325 usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
326 if (IS_ERR(usb_host_ck))
327 return PTR_ERR(usb_host_ck);
328
329 if (!cpu_is_omap15xx())
330 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
331 else
332 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
333
334 if (IS_ERR(usb_dc_ck)) {
335 clk_put(usb_host_ck);
336 return PTR_ERR(usb_dc_ck);
337 }
338
339
340 hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
341 if (!hcd) {
342 retval = -ENOMEM;
343 goto err0;
344 }
345 hcd->rsrc_start = pdev->resource[0].start;
346 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
347
348 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
349 dev_dbg(&pdev->dev, "request_mem_region failed\n");
350 retval = -EBUSY;
351 goto err1;
352 }
353
354 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
355 if (!hcd->regs) {
356 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
357 retval = -ENOMEM;
358 goto err2;
359 }
360
361 irq = platform_get_irq(pdev, 0);
362 if (irq < 0) {
363 retval = -ENXIO;
364 goto err3;
365 }
366 retval = usb_add_hcd(hcd, irq, 0);
367 if (retval)
368 goto err3;
369
370 device_wakeup_enable(hcd->self.controller);
371 return 0;
372err3:
373 iounmap(hcd->regs);
374err2:
375 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
376err1:
377 usb_put_hcd(hcd);
378err0:
379 clk_put(usb_dc_ck);
380 clk_put(usb_host_ck);
381 return retval;
382}
383
384
385/* may be called with controller, bus, and devices active */
386
387/**
388 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
389 * @dev: USB Host Controller being removed
390 * Context: !in_interrupt()
391 *
392 * Reverses the effect of usb_hcd_omap_probe(), first invoking
393 * the HCD's stop() method. It is always called from a thread
394 * context, normally "rmmod", "apmd", or something similar.
395 */
396static inline void
397usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
398{
399 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
400 usb_remove_hcd(hcd);
401 omap_ohci_clock_power(0);
402 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
403 (void) otg_set_host(hcd->usb_phy->otg, 0);
404 usb_put_phy(hcd->usb_phy);
405 }
406 if (machine_is_omap_osk())
407 gpio_free(9);
408 iounmap(hcd->regs);
409 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
410 usb_put_hcd(hcd);
411 clk_put(usb_dc_ck);
412 clk_put(usb_host_ck);
413}
414
415/*-------------------------------------------------------------------------*/
416
417static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
418{
419 return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
420}
421
422static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
423{
424 struct usb_hcd *hcd = platform_get_drvdata(dev);
425
426 usb_hcd_omap_remove(hcd, dev);
427
428 return 0;
429}
430
431/*-------------------------------------------------------------------------*/
432
433#ifdef CONFIG_PM
434
435static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
436{
437 struct usb_hcd *hcd = platform_get_drvdata(pdev);
438 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
439 bool do_wakeup = device_may_wakeup(&pdev->dev);
440 int ret;
441
442 if (time_before(jiffies, ohci->next_statechange))
443 msleep(5);
444 ohci->next_statechange = jiffies;
445
446 ret = ohci_suspend(hcd, do_wakeup);
447 if (ret)
448 return ret;
449
450 omap_ohci_clock_power(0);
451 return ret;
452}
453
454static int ohci_omap_resume(struct platform_device *dev)
455{
456 struct usb_hcd *hcd = platform_get_drvdata(dev);
457 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
458
459 if (time_before(jiffies, ohci->next_statechange))
460 msleep(5);
461 ohci->next_statechange = jiffies;
462
463 omap_ohci_clock_power(1);
464 ohci_resume(hcd, false);
465 return 0;
466}
467
468#endif
469
470/*-------------------------------------------------------------------------*/
471
472/*
473 * Driver definition to register with the OMAP bus
474 */
475static struct platform_driver ohci_hcd_omap_driver = {
476 .probe = ohci_hcd_omap_drv_probe,
477 .remove = ohci_hcd_omap_drv_remove,
478 .shutdown = usb_hcd_platform_shutdown,
479#ifdef CONFIG_PM
480 .suspend = ohci_omap_suspend,
481 .resume = ohci_omap_resume,
482#endif
483 .driver = {
484 .name = "ohci",
485 },
486};
487
488static const struct ohci_driver_overrides omap_overrides __initconst = {
489 .product_desc = "OMAP OHCI",
490 .reset = ohci_omap_reset
491};
492
493static int __init ohci_omap_init(void)
494{
495 if (usb_disabled())
496 return -ENODEV;
497
498 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
499
500 ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
501 return platform_driver_register(&ohci_hcd_omap_driver);
502}
503module_init(ohci_omap_init);
504
505static void __exit ohci_omap_cleanup(void)
506{
507 platform_driver_unregister(&ohci_hcd_omap_driver);
508}
509module_exit(ohci_omap_cleanup);
510
511MODULE_DESCRIPTION(DRIVER_DESC);
512MODULE_ALIAS("platform:ohci");
513MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * OHCI HCD (Host Controller Driver) for USB.
4 *
5 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
6 * (C) Copyright 2000-2005 David Brownell
7 * (C) Copyright 2002 Hewlett-Packard Company
8 *
9 * OMAP Bus Glue
10 *
11 * Modified for OMAP by Tony Lindgren <tony@atomide.com>
12 * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
13 * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
14 *
15 * This file is licenced under the GPL.
16 */
17
18#include <linux/clk.h>
19#include <linux/dma-mapping.h>
20#include <linux/err.h>
21#include <linux/gpio/consumer.h>
22#include <linux/io.h>
23#include <linux/jiffies.h>
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/usb/otg.h>
27#include <linux/platform_device.h>
28#include <linux/platform_data/usb-omap1.h>
29#include <linux/soc/ti/omap1-usb.h>
30#include <linux/soc/ti/omap1-mux.h>
31#include <linux/soc/ti/omap1-soc.h>
32#include <linux/soc/ti/omap1-io.h>
33#include <linux/signal.h>
34#include <linux/usb.h>
35#include <linux/usb/hcd.h>
36
37#include "ohci.h"
38
39#include <asm/io.h>
40#include <asm/mach-types.h>
41
42#define DRIVER_DESC "OHCI OMAP driver"
43
44struct ohci_omap_priv {
45 struct clk *usb_host_ck;
46 struct clk *usb_dc_ck;
47 struct gpio_desc *power;
48 struct gpio_desc *overcurrent;
49};
50
51static const char hcd_name[] = "ohci-omap";
52static struct hc_driver __read_mostly ohci_omap_hc_driver;
53
54#define hcd_to_ohci_omap_priv(h) \
55 ((struct ohci_omap_priv *)hcd_to_ohci(h)->priv)
56
57static void omap_ohci_clock_power(struct ohci_omap_priv *priv, int on)
58{
59 if (on) {
60 clk_enable(priv->usb_dc_ck);
61 clk_enable(priv->usb_host_ck);
62 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
63 udelay(100);
64 } else {
65 clk_disable(priv->usb_host_ck);
66 clk_disable(priv->usb_dc_ck);
67 }
68}
69
70#ifdef CONFIG_USB_OTG
71
72static void start_hnp(struct ohci_hcd *ohci)
73{
74 struct usb_hcd *hcd = ohci_to_hcd(ohci);
75 const unsigned port = hcd->self.otg_port - 1;
76 unsigned long flags;
77 u32 l;
78
79 otg_start_hnp(hcd->usb_phy->otg);
80
81 local_irq_save(flags);
82 hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
83 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
84 l = omap_readl(OTG_CTRL);
85 l &= ~OTG_A_BUSREQ;
86 omap_writel(l, OTG_CTRL);
87 local_irq_restore(flags);
88}
89
90#endif
91
92/*-------------------------------------------------------------------------*/
93
94static int ohci_omap_reset(struct usb_hcd *hcd)
95{
96 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
97 struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
98 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
99 int need_transceiver = (config->otg != 0);
100 int ret;
101
102 dev_dbg(hcd->self.controller, "starting USB Controller\n");
103
104 if (config->otg) {
105 hcd->self.otg_port = config->otg;
106 /* default/minimum OTG power budget: 8 mA */
107 hcd->power_budget = 8;
108 }
109
110 /* boards can use OTG transceivers in non-OTG modes */
111 need_transceiver = need_transceiver
112 || machine_is_omap_h2() || machine_is_omap_h3();
113
114 /* XXX OMAP16xx only */
115 if (config->ocpi_enable)
116 config->ocpi_enable();
117
118#ifdef CONFIG_USB_OTG
119 if (need_transceiver) {
120 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
121 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
122 int status = otg_set_host(hcd->usb_phy->otg,
123 &ohci_to_hcd(ohci)->self);
124 dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
125 hcd->usb_phy->label, status);
126 if (status) {
127 usb_put_phy(hcd->usb_phy);
128 return status;
129 }
130 } else {
131 return -EPROBE_DEFER;
132 }
133 hcd->skip_phy_initialization = 1;
134 ohci->start_hnp = start_hnp;
135 }
136#endif
137
138 omap_ohci_clock_power(priv, 1);
139
140 if (config->lb_reset)
141 config->lb_reset();
142
143 ret = ohci_setup(hcd);
144 if (ret < 0)
145 return ret;
146
147 if (config->otg || config->rwc) {
148 ohci->hc_control = OHCI_CTRL_RWC;
149 writel(OHCI_CTRL_RWC, &ohci->regs->control);
150 }
151
152 /* board-specific power switching and overcurrent support */
153 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
154 u32 rh = roothub_a (ohci);
155
156 /* power switching (ganged by default) */
157 rh &= ~RH_A_NPS;
158
159 /* TPS2045 switch for internal transceiver (port 1) */
160 if (machine_is_omap_osk()) {
161 ohci_to_hcd(ohci)->power_budget = 250;
162
163 rh &= ~RH_A_NOCP;
164
165 /* gpio9 for overcurrent detction */
166 omap_cfg_reg(W8_1610_GPIO9);
167
168 /* for paranoia's sake: disable USB.PUEN */
169 omap_cfg_reg(W4_USB_HIGHZ);
170 }
171 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
172 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
173 } else if (machine_is_nokia770()) {
174 /* We require a self-powered hub, which should have
175 * plenty of power. */
176 ohci_to_hcd(ohci)->power_budget = 0;
177 }
178
179 /* FIXME hub_wq hub requests should manage power switching */
180 if (config->transceiver_power)
181 return config->transceiver_power(1);
182
183 if (priv->power)
184 gpiod_set_value_cansleep(priv->power, 0);
185
186 /* board init will have already handled HMC and mux setup.
187 * any external transceiver should already be initialized
188 * too, so all configured ports use the right signaling now.
189 */
190
191 return 0;
192}
193
194/*-------------------------------------------------------------------------*/
195
196/**
197 * ohci_hcd_omap_probe - initialize OMAP-based HCDs
198 * @pdev: USB controller to probe
199 *
200 * Context: task context, might sleep
201 *
202 * Allocates basic resources for this USB host controller, and
203 * then invokes the start() method for the HCD associated with it
204 * through the hotplug entry's driver_data.
205 */
206static int ohci_hcd_omap_probe(struct platform_device *pdev)
207{
208 int retval, irq;
209 struct usb_hcd *hcd = 0;
210 struct ohci_omap_priv *priv;
211
212 if (pdev->num_resources != 2) {
213 dev_err(&pdev->dev, "invalid num_resources: %i\n",
214 pdev->num_resources);
215 return -ENODEV;
216 }
217
218 if (pdev->resource[0].flags != IORESOURCE_MEM
219 || pdev->resource[1].flags != IORESOURCE_IRQ) {
220 dev_err(&pdev->dev, "invalid resource type\n");
221 return -ENODEV;
222 }
223
224 hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
225 dev_name(&pdev->dev));
226 if (!hcd)
227 return -ENOMEM;
228
229 hcd->rsrc_start = pdev->resource[0].start;
230 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
231 priv = hcd_to_ohci_omap_priv(hcd);
232
233 /* Obtain two optional GPIO lines */
234 priv->power = devm_gpiod_get_optional(&pdev->dev, "power", GPIOD_ASIS);
235 if (IS_ERR(priv->power)) {
236 retval = PTR_ERR(priv->power);
237 goto err_put_hcd;
238 }
239 if (priv->power)
240 gpiod_set_consumer_name(priv->power, "OHCI power");
241
242 /*
243 * This "overcurrent" GPIO line isn't really used in the code,
244 * but has a designated hardware function.
245 * TODO: implement proper overcurrent handling.
246 */
247 priv->overcurrent = devm_gpiod_get_optional(&pdev->dev, "overcurrent",
248 GPIOD_IN);
249 if (IS_ERR(priv->overcurrent)) {
250 retval = PTR_ERR(priv->overcurrent);
251 goto err_put_hcd;
252 }
253 if (priv->overcurrent)
254 gpiod_set_consumer_name(priv->overcurrent, "OHCI overcurrent");
255
256 priv->usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
257 if (IS_ERR(priv->usb_host_ck)) {
258 retval = PTR_ERR(priv->usb_host_ck);
259 goto err_put_hcd;
260 }
261
262 retval = clk_prepare(priv->usb_host_ck);
263 if (retval)
264 goto err_put_host_ck;
265
266 if (!cpu_is_omap15xx())
267 priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
268 else
269 priv->usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
270
271 if (IS_ERR(priv->usb_dc_ck)) {
272 retval = PTR_ERR(priv->usb_dc_ck);
273 goto err_unprepare_host_ck;
274 }
275
276 retval = clk_prepare(priv->usb_dc_ck);
277 if (retval)
278 goto err_put_dc_ck;
279
280 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
281 dev_dbg(&pdev->dev, "request_mem_region failed\n");
282 retval = -EBUSY;
283 goto err_unprepare_dc_ck;
284 }
285
286 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
287 if (!hcd->regs) {
288 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
289 retval = -ENOMEM;
290 goto err2;
291 }
292
293 irq = platform_get_irq(pdev, 0);
294 if (irq < 0) {
295 retval = irq;
296 goto err3;
297 }
298 retval = usb_add_hcd(hcd, irq, 0);
299 if (retval)
300 goto err3;
301
302 device_wakeup_enable(hcd->self.controller);
303 return 0;
304err3:
305 iounmap(hcd->regs);
306err2:
307 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
308err_unprepare_dc_ck:
309 clk_unprepare(priv->usb_dc_ck);
310err_put_dc_ck:
311 clk_put(priv->usb_dc_ck);
312err_unprepare_host_ck:
313 clk_unprepare(priv->usb_host_ck);
314err_put_host_ck:
315 clk_put(priv->usb_host_ck);
316err_put_hcd:
317 usb_put_hcd(hcd);
318 return retval;
319}
320
321
322/* may be called with controller, bus, and devices active */
323
324/**
325 * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
326 * @pdev: USB Host Controller being removed
327 *
328 * Context: task context, might sleep
329 *
330 * Reverses the effect of ohci_hcd_omap_probe(), first invoking
331 * the HCD's stop() method. It is always called from a thread
332 * context, normally "rmmod", "apmd", or something similar.
333 */
334static int ohci_hcd_omap_remove(struct platform_device *pdev)
335{
336 struct usb_hcd *hcd = platform_get_drvdata(pdev);
337 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
338
339 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
340 usb_remove_hcd(hcd);
341 omap_ohci_clock_power(priv, 0);
342 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
343 (void) otg_set_host(hcd->usb_phy->otg, 0);
344 usb_put_phy(hcd->usb_phy);
345 }
346 iounmap(hcd->regs);
347 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
348 clk_unprepare(priv->usb_dc_ck);
349 clk_put(priv->usb_dc_ck);
350 clk_unprepare(priv->usb_host_ck);
351 clk_put(priv->usb_host_ck);
352 usb_put_hcd(hcd);
353 return 0;
354}
355
356/*-------------------------------------------------------------------------*/
357
358#ifdef CONFIG_PM
359
360static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
361{
362 struct usb_hcd *hcd = platform_get_drvdata(pdev);
363 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
364 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
365 bool do_wakeup = device_may_wakeup(&pdev->dev);
366 int ret;
367
368 if (time_before(jiffies, ohci->next_statechange))
369 msleep(5);
370 ohci->next_statechange = jiffies;
371
372 ret = ohci_suspend(hcd, do_wakeup);
373 if (ret)
374 return ret;
375
376 omap_ohci_clock_power(priv, 0);
377 return ret;
378}
379
380static int ohci_omap_resume(struct platform_device *dev)
381{
382 struct usb_hcd *hcd = platform_get_drvdata(dev);
383 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
384 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
385
386 if (time_before(jiffies, ohci->next_statechange))
387 msleep(5);
388 ohci->next_statechange = jiffies;
389
390 omap_ohci_clock_power(priv, 1);
391 ohci_resume(hcd, false);
392 return 0;
393}
394
395#endif
396
397/*-------------------------------------------------------------------------*/
398
399/*
400 * Driver definition to register with the OMAP bus
401 */
402static struct platform_driver ohci_hcd_omap_driver = {
403 .probe = ohci_hcd_omap_probe,
404 .remove = ohci_hcd_omap_remove,
405 .shutdown = usb_hcd_platform_shutdown,
406#ifdef CONFIG_PM
407 .suspend = ohci_omap_suspend,
408 .resume = ohci_omap_resume,
409#endif
410 .driver = {
411 .name = "ohci",
412 },
413};
414
415static const struct ohci_driver_overrides omap_overrides __initconst = {
416 .product_desc = "OMAP OHCI",
417 .reset = ohci_omap_reset,
418 .extra_priv_size = sizeof(struct ohci_omap_priv),
419};
420
421static int __init ohci_omap_init(void)
422{
423 if (usb_disabled())
424 return -ENODEV;
425
426 ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
427 return platform_driver_register(&ohci_hcd_omap_driver);
428}
429module_init(ohci_omap_init);
430
431static void __exit ohci_omap_cleanup(void)
432{
433 platform_driver_unregister(&ohci_hcd_omap_driver);
434}
435module_exit(ohci_omap_cleanup);
436
437MODULE_DESCRIPTION(DRIVER_DESC);
438MODULE_ALIAS("platform:ohci");
439MODULE_LICENSE("GPL");